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78 lines
3.1 KiB
Python
78 lines
3.1 KiB
Python
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from django.db import models
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from django.core import validators
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from django.conf import settings
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from django.utils.translation import ugettext_lazy as _
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from django.core.exceptions import ValidationError
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from core.models import User
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# Create your models here.
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class Club(models.Model):
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"""
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The Club class, made as a tree to allow nice tidy organization
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"""
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name = models.CharField(_('name'), max_length=30)
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parent = models.ForeignKey('Club', related_name='children', null=True, blank=True)
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unix_name = models.CharField(_('unix name'), max_length=30, unique=True,
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validators=[
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validators.RegexValidator(
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r'^[a-z0-9][a-z0-9._-]*[a-z0-9]$',
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_('Enter a valid unix name. This value may contain only '
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'letters, numbers ./-/_ characters.')
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),
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],
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error_messages={
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'unique': _("A club with that unix name already exists."),
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},
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)
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address = models.CharField(_('address'), max_length=254)
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# email = models.EmailField(_('email address'), unique=True) # This should, and will be generated automatically
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def check_loop(self):
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"""Raise a validation error when a loop is found within the parent list"""
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objs = []
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cur = self
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while cur.parent is not None:
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if cur in objs:
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raise ValidationError(_('You can not make loops in clubs'))
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objs.append(cur)
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cur = cur.parent
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def clean(self):
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self.check_loop()
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def __str__(self):
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return self.name
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class Membership(models.Model):
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"""
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The Membership class makes the connection between User and Clubs
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Both Users and Clubs can have many Membership objects:
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- a user can be a member of many clubs at a time
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- a club can have many members at a time too
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A User is currently member of all the Clubs where its Membership has an end_date set to null/None.
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Otherwise, it's a past membership kept because it can be very useful to see who was in which Club in the past.
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"""
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user = models.ForeignKey(User, related_name="membership", null=False, blank=False)
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club = models.ForeignKey(Club, related_name="members", null=False, blank=False)
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start_date = models.DateField(_('start date'), auto_now=True)
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end_date = models.DateField(_('end date'), null=True, blank=True)
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role = models.IntegerField(_('role'), choices=sorted(settings.CLUB_ROLES.items()),
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default=sorted(settings.CLUB_ROLES.items())[0][0])
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description = models.CharField(_('description'), max_length=30, null=False, blank=True)
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def clean(self):
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if Membership.objects.filter(user=self.user).filter(club=self.club).filter(end_date=None).exclude(pk=self.pk).exists():
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raise ValidationError(_('User is already member of that club'))
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def __str__(self):
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return self.club.name+' - '+self.user.username+' - '+settings.CLUB_ROLES[self.role]+str(
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" - "+str(_('past member')) if self.end_date is not None else ""
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)
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